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三段相加 = tambah tiga bahagian Danial 扫地 35 minit、休息 10 minit、洗车 1 jam 5 minit，从开始到完成三段都要加。minit：35 + 10 + 5 = 50；jam：1。答案 1 jam 50 minit。1 jam 40 minit 是漏了休息；2 jam 50 minit 是多算了 1 jam。检查：1 jam 50 minit − 1 jam 5 minit − 10 minit = 35 minit。 例子：洗碗 20 minit，休息 5 minit，抹桌 15 minit，一共 40 minit。 注意：帮忙做家务中间的休息，也在“从开始到完成”里面。

adding three parts = tambah tiga bahagian Danial sweeps for 35 minutes, rests 10 minutes and washes the car for 1 hour 5 minutes, and all three parts count from start to finish. Minutes: 35 + 10 + 5 = 50; hours: 1. The answer is 1 jam 50 minit. 1 jam 40 minit leaves out the rest, and 2 jam 50 minit adds an extra hour. Check: 1 jam 50 minit − 1 jam 5 minit − 10 minit = 35 minit. Example: washing dishes for 20 minutes, resting 5 and wiping the table for 15 takes 40 minutes in all. Watch out: a break in the middle of the chores is still inside the time from start to finish.

两步：先求时段，再扣休息 = cari tempoh, kemudian tolak rehat 第一步：2:15 petang 到 5:00 petang。2:15 到 3:00 是 45 minit，3:00 到 5:00 是 2 jam，共 2 jam 45 minit。第二步：扣掉休息，45 − 25 = 20，答案 2 jam 20 minit。2 jam 45 minit 是没扣休息；3 jam 10 minit 是把休息加上去了。 例子：9:30 pagi 到 11:00 pagi 是 1 jam 30 minit，含休息 10 minit，真正做事 1 jam 20 minit。 注意：先凑到整点再数，时段比较不容易算错。

two steps: find the period, then remove the rest = cari tempoh, kemudian tolak rehat Step one: from 2:15 petang to 5:00 petang. 2:15 to 3:00 is 45 minutes and 3:00 to 5:00 is 2 hours, so 2 jam 45 minit. Step two: remove the rest, 45 − 25 = 20, giving 2 jam 20 minit. 2 jam 45 minit forgets the rest, and 3 jam 10 minit adds it instead. Example: 9:30 pagi to 11:00 pagi is 1 hour 30 minutes; with a 10-minute break inside, the real work is 1 hour 20 minutes. Watch out: count up to the next full hour first, which makes the period easier to find.

两次乘法 = darab dua kali 第一步求一天：每餐后洗 15 minit，一天 3 次，15 × 3 = 45 minit。第二步求 4 天：45 × 4 = 180 minit，180 minit 是 3 个 60，所以是 3 jam。1 jam 是只算了 15 × 4，漏了一天 3 次；45 minit 只是一天的时间。检查：3 jam ÷ 4 = 45 minit，45 ÷ 3 = 15。 例子：每次刷牙 3 minit，一天 2 次，5 天共 30 minit。 注意：题目有“每次”和“每天”两层，要乘两次。

multiplying twice = darab dua kali Step one finds one day: 15 minutes after each meal, 3 times a day, 15 × 3 = 45 minutes. Step two finds 4 days: 45 × 4 = 180 minutes, which is three 60s, so 3 jam. 1 jam only works out 15 × 4 and misses the 3 meals a day, while 45 minit is just one day. Check: 3 hours ÷ 4 = 45 minutes and 45 ÷ 3 = 15. Example: brushing teeth for 3 minutes, twice a day, for 5 days takes 30 minutes. Watch out: the question has two layers, each meal and each day, so multiply twice.

先减后除 = tolak dahulu, kemudian bahagi 休息只有一次，是在整段时间里的，所以先从总时间扣掉：6 jam 40 minit − 40 minit = 6 jam。第二步把做椅子的时间平分给 4 张：6 jam = 360 minit，360 ÷ 4 = 90 minit = 1 jam 30 minit。1 jam 40 minit 是没扣休息就除；1 jam 是除完后每张都扣 40 minit，但休息只有一次。 例子：3 jam 15 minit 做 3 个风筝，含休息 15 minit，每个风筝 1 jam。 注意：先看休息是“一共一次”还是“每份都有”，再决定先减还是先除。

subtract first, then divide = tolak dahulu, kemudian bahagi There is only one rest, inside the whole period, so take it off the total first: 6 jam 40 minit − 40 minit = 6 jam. Step two shares the working time among the 4 chairs: 6 hours = 360 minutes, and 360 ÷ 4 = 90 minutes = 1 jam 30 minit. 1 jam 40 minit divides without removing the rest, and 1 jam takes 40 minutes off every chair, although there was only one rest. Example: making 3 kites in 3 hours 15 minutes with one 15-minute break gives 1 hour per kite. Watch out: decide whether the rest happens once in total or in every share, then choose subtract-first or divide-first.